Power-hammer



No. 6|6,998. I Paiented lan. 3, |899. H. WHOIVIES.

POWER HAMMER.

(Application led Aug. 30, 1897.) (N0 Mdl.) 3 Sheets-Sheet l.

q i i ,MV ai, W t Q w Wm WU m No. 6|6,998. Patented Jan. 3, |899. H. WHOMES.

POWER HAMMER.

(Application led Aug. 30, 1897.)

3 Shets-Sheet 2 (No model.)

MNM

Patented lan. 3, |899.

No. mamas.

H. WHOWIES.

POWER HAMMER.

(Application med Aug. 80, 1897.) (No Model.) 3 Sheets-Sheet 3.

Unirrnn Strains Farrar @iu-ica HENRY VHOMES, OF WINONA, MINNESOTA.

SPECIFICATION forming part of Letters Patent No. 616,998, dated January 3, 189;

Application filed August 30, 1897.

To LZZ wh/0771, it may conce/1n:

lle it known that I, HENRY VHOMES, a citizen of the United States, residing at Winona, in the county of Winona, in the State of Minnesota, have invented certain new and useful Improvements in Power-Hammers, of which the following is a description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates more particularly to power-hammers operated by compressed air, although steam may be employed as the motive iiuid.

It has also been designed, primarily, as a flue-Welder for welding tips to the fines of locomotive and other boilers; but it is applicable to other purposes, as will be hereinafter explained.

In the accompanying drawings, Figure 1 represents a top plan view of the machine when employed as a iiue-welder and with the parts in operating position; Fig. 2, an elevation of the left side thereof with part of the framework broken away to expose the welding-dies and with the motive fluid cut off from the engine and the parts at rest; Fig. 3, a longitudinal section of a flue-tip and part of a flue having their meeting ends scarfed preparatory to being welded together; Fig. 4, a longitudinal section of one of the spacingsleeves; Fig. 5, a vertical section of the check or throttle valve controlling the admission of the motive fluid to the engine; Fig. 6, a front elevation of the machine with the cylinder, piston, and valve in middle vertical section; Fig. 7, a sectional detail of the engine-valve; and Fig. 8, a front elevation, partly in section, of the machine when employed as a powerhammer for other purposes than welding.

The same letters of reference are used to indicate corresponding parts in all the views.

The machine, generally described as a whole, consists of a lower die or anvil block, a vertical engine whose piston-rod carries at its lower end the upper die or hammer, a mandrel interposed between the two dies and upon which the iiue and tip to be welded together are placed, and means for automatically starting the engine by the act of slipping the iue and tip over the mandrel into position to be welded together and for automatically stop- Serial No. 649,933. (No model.)

ping the engine by the act of withdrawing the welded flue and tip from the mandrel.

In the drawings, A represents the bed-plate of the machine, from which rise two opposite frame-plates B B', which support at their upper ends the engine-cylinder C. Resting in a seat D, formed upon the bed-plate A, between the supports B B', is the removable lower die E, While F represents the upper die, which is carried by but detachable from the lower end of the piston-rod of the engine hereinafter described.

Extending rearward from the bed-plate A is a plate G, whose eXtreme rear end has formed upon it a vertical bracket H, through a recess or opening in which passes the rear end of the sliding mandrel I, the mandrel being held from displacement vertically by a cross-pin d. The rear portion of this mandrel I, which passes through and is adapted to slide back and forth in the opening in the plate II, is of reduced diameter, and the sliding movement of the mandrel is limited by collars J K, secured upon it on opposite sides of the supporting-plate II. The opposite or forward end of the mandrel I rests in the lower die E, and its extreme forward end is rounded, as shown, and projects over a flaring trough L, supported upon the bed-plate A and abutting at its rear end against the die E.

Secured to the outer side of the right-hand frame-plate B' is a trough I), open at its forward end and closed at its rear end by a head Q, while mounted upon the outer side of the opposite frame-plate B is a concave roller R.

The induction-pipe M for conveying the motive duid to the engine passes beneath the plate G and has interposed in it, beneath said plate, a valve N, (shown in section in Fig. 5,) whose valve-stem extends upward through the plate G into position for its upper end to cooperate with a collar O, mounted upon the mandrel I.

The construction of the engine is such, as hereinafter described,thatwheneverthe valve N in the supply-pipe M is opened and motive fluid thereby admitted to the engine the upper die F will be rapidly reciprocated, and with this understanding the general operation of the machine maybe described as fol- IOO lows, starting with the parts in the position shown in Fig. 2: The adjacent ends of the tip and flue, which are to be welded together, are preferably first scarfed, as shown in Fig. 3, and the end of one slipped into the other as far as the scarfing will permit. The tip and end of the flue are then placed in the trough l), above described, and pushed rearward along the same, and the rear end of the tip forcibly jammed against the head Q of the trough, this trough being provided simply as a convenient means for forcing the meeting ends of the tip and fiue tightly together, so that they will hold to each other while placed in the fire and heated preparatory to being welded together. After being heated the flue and connected tip are removed from the fire and the rear end of the tip slipped over the front end of the mandrel I and slid rearwardly thereon until its rear end contacts with the front end of the spacing-sleeve S, which has first been slipped over the mandrel. The rear end of this spacing-sleeve S abuts against the collar O, which is mounted so as to slide upon the mandrel I, and the rear side of the collar O abuts against the collar K, which is fast upon the mandrel I. After the rear end of the flue-tip T contacts with the front end of the spacing-sleeve S, any further movement of the flue-tip and flue will force the mandrel I rearward from the position shown in Fig. 2, and as the parts approach their rearward limit of movement the collar O will ride over the upper end of the valve-stein of the valve N and depress it and open the Valve, Fig. l, thereby admitting the motive fluid to the engine and starting the latter. Now the distance between the forward side of the collar O, and the middle line of the dies E F is such relatively to the length of the spacing-sleeve S and the iiue-tip T that when the parts have been thus forced to rearward position and the valve opened the joint between the flue-tip and tine will be in proper position between the dies, so as to be acted upon by the upper die F when the reciprocation of the latter begins in consequence of the opening of the valve N. After the joint has been welded the fiue and its welded tip are pulled forward to withdraw them from the mandrel, but the friction between their inner surface and the outer surface of the mandrel; will be sufficient to slightly resist their withdrawal from the mandrel, with the result that when they are pulled forward to withdraw them from the mandrel they will carry the latter forward with them until it is arrested by contact of its collar .I with the rear side of the plate II. The sliding collar O upon the mandrel is carried forward with the mandrel during this movement, owing to the contact of the fast collar K with the rear side of the collar O, so that the act of pulling the flue and welded-tip forward to withdraw them from the mandrel will carry the collar O away from the valve-stem of the valve N and permit the spring to close the valve. rlhe withdrawal of the welded .iiue and tip therefore serves to automatically stop the engine, just as the placing of them into position to be welded serves to automatically start the engine.

The operator of the machine will usually have an assist-ant to take away the welded fines and tips, to whom they will be passed by the operator over the bearing-off roller R as he removes them from the mandrel.

It will be understood that the only purpose of the sleeve S is to fill in the space between the rear end of the flue-tip T and the forward side of the collar O, so that when the tip and line are slipped over the mandrel and the parts forced to their extreme rearward position the joint between the tip and iiue will come to proper position between the dies at the time the collar O rides over the upper end of the valve-stein and opens the valve N to admit the motive liuid to the engine. In the machine from which the drawings in the present case were made the distance between the middle line of the dies and the forward side of the collar O is twelve inches, so that for the welding of tips six inches in length upon such a machine a spacing-sleeve S siX inches in length will be employed, and for tips of greater or less length spacing-sleeves of correspondingly less or greater length will be employed, while with tips twelve inches in length the spacing-sleeve will be entirely dispensed with. The spacing sleeves are therefore employed solely to adapt a machine having a capacity for long tips to the welding of tips of shorter lengths.

It is not absolutely essential, but highly desirable, that the collar O, which serves to open the valve N, shall be mounted to slide upon the mandrel I, for this reason: If it were fast upon or formed integral with the mandrel, it would necessarily ride over the valvestem and open the valve N whenever the mandrel was forced to rearward position. Now with the mandrel in the position shown in Fig. 2 when the end of the flue tip is slipped over the front end of the mandrel and pushed rearward the friction between its inner surface and the mandrel will often be sufficient to cause it to force the mandrel rearward until arrested by contact of its collar K with the plate II, and if the collar O were fast upon the mandrel the valve N would thus be opened and the engine started before the joint between the iiue-tip and flue was brought to position between the dies. With the collar O loosely mounted upon the mandrel, however,when the mandrel is moved rearward in this manner the collar will be arrested in its rearward movement when its lower side contacts with the upper end of the valve-stein, and the mandrel will slide onward through it without causing the valve to be opened. Vhen the rear end of the tip T contacts with the front end of the spacingsleeve S, the further rearward movement of the tip and flue upon the mandrel will force [CO A IIO i ring particularly to Figs. 6 and 7.

the collar O rearward over the valve-stem and serve to open the valve when the joint to be welded reaches proper position between the dies. If the mandrel were held by some means in right-hand forward position while the .fine-tip and flue were being slipped upon it, so that the valve N would not be prematurely opened in the manner indicated, the collar O might be fast upon or formed integral with the mandrel, as might also be the case if the rearward movement of the mandrel were retarded by friction sufficient to overcome the friction between the flue-tip and mandrel; but it will be understood from the foregoing that the provision of the sliding collar is highly advantageous in rendering the operation of the device as nearly automatic as possible, since the only manual operation necessary is to slip the flue-tip and ilue over the front end of the mandrel and press them rearward until the machine is started, and to pull them forward and withdraw them from the mandrel when the welding has been completed.

I will next describe the engine by means of which the upper die F is reciprocated, refer- The cylinder C of the engine is secured at its lower end to a cross-plate C', connecting the upper ends of the upright frame-plates B B'. The lower end of the hollow piston V passes through and is guided in a circular opening in the plate C' and has the removable die F secured in it, as indicated. Formed integral with the piston V, at its upper end, is the piston-head W, iitting the cylinder C, while surrounding the piston, beneath its head XV, is a coiled spring X, which rests at its lower end upon the plate C'. The engine is single-acting, and the spring X serves to return the piston to its upper position after it has been depressed by the admission of motiv iiuid to its upper end.

The upper end of the piston-head lV is provided with a circular recess to accommodate the valve-casing, which is iirmly secured to the upper head Y of the cylinder C. This valve-casing consists of a circular block Z, having a circular plate Z' fitted to its lower end and provided at its upper end with an internally-threaded neck which extends upward through and fits a circular opening in the cylinder-head Y and has screwed into it a bushing Y. The valve-casing is secured to the cylinder-head Y by means of four screws X', whose upper ends are shown in Fig. l and which pass downward through the cylinderhead Y and block Z and at their lower ends engage threaded holes in the plate Z', as seen in Fig. 7.

The Valve-easing above described is provided with a central vertical chamber in which fits a tubular valve A', provided near its lower end with an annular iiange D', which is conned and has vertical play within an annular chamber E', formed within the valveblock Z. The extreme lower end of the valve A' closely iits and has vertical movement in a circular opening in the lower plate Z' of the valve-casing, which plate is provided around the valve with a circle of ports F', furnishing communication between the chamber E' and the space below the valve-casing, within the upper end of the piston-head lV. The ports F' open at their upper ends through an annular recess F", formed in the upper side of the plate Z' around the central opening therein.

The upper end of the valve A' snugly fits within the bushing Y and is provided with a head G', which has a circle of ports H' and a central opening through which passes a stem or rod J', which carries at its lower end a circular valve-disk K', which cooperates with the lower end of the valve A'. Within the valve A' the stem J' is provided with wings L', fitting the inner surface of the Valve A to properly guide the stem J in its vertical movements within the valve A'. The head G of the upper end of the valve A' is provided with an annular recess around the central opening through which the stem J' passes, and the upper end of the stem J' has secured upon it a collar N'. An induction-port O' communicates at its outer end with the supply-pipe M and at its inner end with the chamber F.' in the valve-casing. The pistonhead lV is provided with a central circular recess P' immediately beneath the valve-disk K' and has secured in it a screw Q', whose upper end projects into said recess and is adapted to cooperate with the valve-stem J' and disk K.

From the foregoing description the operation of the valve mechanism and its coperation with the piston may be briefly explained as follows: Vith the parts shown in the position in Fig. G the motive iiuidl admitted through the port O' into the chamber E will pass thence through the ports F' to the upper side of the piston-head W and drive the piston downward, compressing the spring X. As the piston approaches its limit of downward movement the stem J is depressed by means hereinafter described. The iirst portion of the downward movement of this stem will unseat the disk K', which has been seated against the lower end of the valve A', and open communication between the Lipper side of the piston and the interior of the tubular valve A' and permit the motive fluid which has driven the piston downward to escape through said valve and out the exhaust-ports ll. Immediately following the unseating of the valve-disk K' in the manner described the valve A' will be forced downward and its flange D' seated on the plate Z', thereby closing the ports F' and cutting off the admission of the motive fluid from the inlet-port O'. For

IOO

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present purposes it may be assumed that this downward movement of the valve A' is produced by contact of the collar N' of the stem J' with the upper end of head G' of the Valve A', which might be the case, although in the present instance it is not, as will be hereina ciegos after explained. The cutting off of the supply and opening of the exhaust by the shifting of the valves as above described will permit the spring X to return the piston to upper position, and as the piston approaches such position the upper end of its central screw Q' will contact with the under side of the valve-disk K' and lift the latter and its stem J' to normal position, rst seating the disk K' against the lower end of the valve A', and thereby closing the exhaust, and then lifting the valve A' to upper position and opening the communication between the inlet-port O' and the upper side of the pistonhead to drive the piston downward again.

It now remains only to describe the means for depressing the valves K' and A' as the piston approaches the limit of its downward movement, as follows: Projecting from the left-hand side 0f the cylinder C at its upper end is a bracket or supporting arin R', to Whose outer end is pivoted the left-hand end of the upper horizontal arm S' of a T-shaped lever, consisting of such upper arm S' and a depending vertical arm T'. The extreme right-hand end of the arm S' of this lever overlies the upper end of the valve-stem J', and the end of the lever-arm is widened and forked or provided with two depending pins U', which straddle the collar N' upon the upper end of the valve-stem J'. When the end of the lever-arm S' is depressed, it will force the valve-stem J' downward and unseat the valvedisk K', and when the lower ends of the pins U' contact with the upper end or head G' of the valve A' the latter will be likewise forced downward. In the present instance the length of the pins U' is such relatively to the collar N' that the lower ends of the pins will contact with the upper end of the valve A' before the lower side of the collar N' contacts with the valve A', the lower end of the collar in its downward movement entering the recess M' in the end of the valve, so that the downward movement of the valve A' is effected directly by means of the lever-arm S' instead of indirectly through the collar N' on the valve-stem J'. The pins U' might, however, be dispensed with and the end of the lever-arm S' simply rest upon the upper side of the collar N' and the latter be employed as the intermediate agent to depress the valve A', in which event the collar N' would be made sufficiently heavy and secured to the valve-stem with sufficient firmness to stand the duty placed upon it. The vertical arm T' of the T-shaped lever has secured upon it a shoe V', with which cooperates a tappet projection WV', carried by the piston and eX- tending through and traveling in a vertical slot in the side of the cylinder C. As the piston moves downward the projection W' will contact with the shoe V' and throw the lower end of the lever-arm T' outward, thereby depressing the inner end of its upper arm S', with the results above described. Vhen the piston is returned to upper position by its spring X, the lifting of the valvestem J' will lift the upper end of the lever S and restore the lever to normal position. A buffer-spring X" is interposed between the lever-arm T' and the side of the cylinder C to prevent any shock or jar when the lever is returned to normal position by the upward movement of the piston. The shoe V' may be adj ustably secured upon the lever-arm T', so that it may be set to position to contact with the tappet projection W' and shift the valves at the desired point in the downward movement of the piston.

If desired, means within the control of the operator for adjusting the shoe V' without stopping the machine may be provided, as hereinafter described.

As heretofore stated, my invention has been designed, primarily, as a flue-Welder, and in this respect my machine is believed to be broadly new independently of the particular construction and operation of the engine which forms part of the machine, as indicated by the terms of my claims; but the engine part of the machine may without any substantial modiiication be employed as a power-ham mer forotherpurposes than flue-welding and may be so employed with especial and peculiar advantage for some classes of work by the use of the following simple additions and modifications, reference being had to Fig. 8. In this View the framework and the piston and cylinder and valve mechanism and means for operating the valve mechanism remain the same as in the construction previously described. For the line-welding dies other suitable dies for the work to be performed will be substituted, the lower die being placed in the seat D and the upper die secured in the lower end of the piston. The valve in the supply-pipe M will be transposed from the position it occupied in the previously-described construction to the position shown at N" in Fig. 8, where the upper end of the stern of the valve will cooperate with the right-hand end of alever A3, which is fulcrumed upon an arm B3, projecting upward from the cylinderhead Y, and whose opposite end cooperates with the right-hand end of a second lever C3, which is fulcrumed upon the arm R', which supports the T- shaped lever heretofore described. The outer end of the lever C3 is connected by a depending link D3 with a footlever E3. The shoe V' upon the lever-arm T' is mounted to slide freely upon said arm instead of being fixed thereto, as in Fig. '7, and it has connected to it the lower end of a link F3, whose upper end is pivoted to the inner end of the lever C3, above referred to.

Under the abovedescribed construction upon depressing the foot-lever E3 the lever C3 will. be rocked and its inner end thrown upward, causing the lever A3 to be rocked in the opposite direction and its right-hand end to depress the valve-stem of the valve N" and admit the motive iuid to the engine to start the same. The depression of the foot- IOO IIO

lever and rocking of the lever C3 in the manner described will cause the link F3 to lift the shoe V upon the lever-arm T', and the distance the shoe V' is thus lifted will depend upon the extent to which the foot-lever is depressed. By depressing the foot-lever a greater or less distance, therefore, the shoe V may be adjusted to different positions to cause it to contact with the tappet projection NV' at the different points in the downward movement of the piston to thus shift the valves at different points in such downward movement and thereby regulate the length of the strokes of the piston at will. This is a matter of very great advantage and convenience in many kinds of work in which it is desired to use the power-hammer in continuous work upon materials of varying or different thicknesses. In the absence of means for thus readily adjusting the shoe V if the shoe be set upon the lever-arm T so as to produce a piston stroke of given lengih for work upon material of a given thickness the piston cannot be given a stroke of greater length for work upon material of less thickness without stopping the machine and readjusting the parts. By placing the adjustment of the shoe V' under the ready control of the operator, as described, however, the machine may be used in continuous work upon materials of any varying thickness within the capacity of the machine. For instance, in drawing out the leaves of car-springs the strokes of the piston may be readily regulated by means of the foot-lever, so that the hammer will be caused to operate properly and continuously upon the leaf of the spring from its thickest middle portion to its thin extremity. Another instance is in the drawing ont of chisel-blanks, where the tapering off of the blank to the cutting edge of the chisel tends to spread the blank and unduly widen it, and in doing the work it is frequently necessary to turn the blank upon its edge and hammer it back to proper width. The turning of the blank upon its edge for this purpose immediately presents material of increased thickness to the action of the hammer, while the turning of the blank to its other position immediately presents material of less thickness to the hammer and the lengths of the strokes of the piston require corresponding adjustment. By using my machine for a short time the operator will readily acquire sufficient skill to regulate the strokes of the piston as may be necessary.

It will be understood that the valve-stem of the valve N" has considerable range of movement after being depressed suiciently to open the valve, so that a slight depression of the foot-lever will serve to open the valve, while a considerable movement of the parts beyond that point will be permitted to accommodate the necessary adjustments of the shoe upon the lever. In Fig. 8 the foot-lever is shown depressed to nearly the limit of move ment of the parts to produce comparatively short strokes of the piston.

Having thus fully described my invention, I claim* l. In a Hue-welding machine, the combination, with a stationary die, a reciprocating die and an engine for operating the reciprocating die, of a mandrel interposed between the dies, a valve controlling the admission of motive fluid to the engine, and means for opening said valve by the act of placing the Hue-tip and liuc upon the mandrel in position to be welded.

2. In a flue-welding machine, the combination, with a stationary di e, a reciprocating die and an engine for operating the reciprocating die, of a mandrel interposed between the dies, a valve controlling the admission of motive fluid to the engine, and means for closing said valve by the act of withdrawing the welded tip and flue from the mandrel.

3. In a fluewelding machine, the combination, with a stationary die, a reciprocating die and au engine for operatin g the reciprocating die, of a mandrel interposed between the dies, a valve controlling the admission of motive iiuid to the engine, and means for opening said valve by the act of placing the flue-tip and flue upon the mandrel in position to be Welded and for closing said valve by the act of withdrawing the welded tip and lue from the mandrel.

4. In a flue-welding machine, the combination, with a stationary die, a reciprocating die and an engine for operating the reciprocating die, of a sliding mandrel interposed between the dies, adapted to be slid in one direction by the act of placing the flue-tip and flue upon it in position to be welded, a valve controlling the admission of the motive fluid to the engine, and means intermediate the sliding mandrel and said valve for causing the valve to be opened by the act of placing the line-tip and flue upon the mandrel in position to be welded.

5. In a Hue-welding machine, the combination, with a stationary die, areciprocating die and an engine for operating the reciprocating die, of a sliding mandrel interposed between the dies, adapted to be slid in one direction by the act of placing the Hue-tip and iiue upon it in position to be welded, and to be slid in the opposite direction by the act of withdrawing the welded tip and flue from it, a Valve controlling the admission of the motive fluid to the engine, and means intermediate the sliding mandrel and said valve for causing the valve to be opened by the act of placing the fiue-tip and flue' upon the mandrel in position to be welded and to be closed by the act of withdrawing them therefrom.

G. In a flue-welding machine, the combinati'on, With a stationary die, a reciprocating die and an engine for operating the reciprocating die, of a sliding mandrel interposed between the dies, adapted to be slid in one direction IOO IIO

by the act of placing the flue-tip and flue upon it in position to be Welded, and to be slid in the opposite direction by the act of withdrawing the Welded tip and vI'lue from it, a valve controlling the admission of the motive fluid to the engine, and a collar or projection upon the sliding mandrel cooperating with the stern of such valve to cause the valve to be opened by the act of placing the fluetip and ilue upon the mandrel in position to be Welded and to be closed by the act of withdrawing them therefrom.

7. In a flue-Welding machine, the combination, with a stationary die, a reciprocating die and an engine for operating the reciprocating die, of a sliding mandrel interposed between the dies, adapted to be slid in one direction by the act of placing the flue-tip and line upon it in position to be Welded, a valve controlling the admission of the motive Huid to the engine,and a sliding collar mounted upon the mandrel and cooperating with the valve to open the latter when the flue-tip and tlue are placed in position upon the mandrel.

S. In a flue-Welding machine, the combination, with a stationary die, a reciprocating die and an engine for operating the reciprocating die, of a sliding mandrel interposed between the dies, adapted to be slid in one direction by the act of placing the flue-tip and flue upon it in position to be Welded, and to be slid in the opposite direction by the act of withdrawing the Welded tip and flue from it, a valve controlling the admission of the motive fluid to the engine, and a sliding collar mounted upon the mandrel and cooperating with the valve to open the latter When the flue-tip and flue are placed in position upon the mandrel and moving with the mandrel when the Welded tip and flue are Withdrawn, to permit the valve to close.

9. In a line-Welding machine, the combination of the stationary die E, the reciprocating die F and the engine for operating the same, the supply-pipe M, the valve N interposed in said pipe, the sliding mandrel L, and the collar O mounted thereon and cooperating with the stem of the valve N.

l0. In a flue-welding machine, the combination of the stationary die E, the reciprocating die F and engine for operating the same, the supply-pipe M, the valve N interposed therein, the sliding mandrel I resting at its forward end in the die E and extending at its rear end through and supported in the frameplate H, and provided with the collars J K for limiting its movement in opposite directions, and the sliding collar O mounted upon the mandrel I and cooperating with its collar K and the stem of the valve N.

1l. The combination of the cylinder C, the piston V having the head V provided with the tappet IV' projecting through the slot NV" in the side of the cylinder, the spring X surrounding the piston, the valve mechanism controlling the inlet and exhaust of the motive fluid at the upper side of the piston, and

the lever S T cooperating with the valve mechanism and with the tappet IV of the piston.

12. The combination of the cylinder C, the piston V having the head XV provided with the tappet XV projecting through the slot IV in the side of the cylinder, the spring X surrounding 'the piston, the valve mechanism controlling the inlet and exhaust of the motive fluid at the upper side of the piston, and the lever S T cooperating with the valve mechanism and provided with the adjustable shoe V cooperating with the tappet W of the piston.

13. The combination of the cylinder C, the piston V having the head YV provided with the tappet W projecting through the slot X in the side of the cylinder, the spring X surrounding the piston, the valve mechanism controlling the inlet and exhaust of the motive fluid at the upper side of the piston, the lever S T cooperating with the valve mechanism and provided With the adjustable shoe V cooperating with the tappet VVof the piston, and means Within the control of the 0perator for adjusting the shoe V in relation to the tappet IV' Without stopping the engine.

14:. The combination of the cylinder C, the piston V having the head IV provided with the tappet W projecting through the slot IV in the side of the cylinder, the spring X surrounding the piston, the valve mechanism controlling the inlet and exhaust of the motive iiuid at the upper side of the piston, the lever S T cooperating with the valve mechanism and provided with the adjustable shoe V cooperating with the tappet W ofthe piston, a foot-lever and connections between the same and the adjustable shoe V for adjusting the latter in relation to the tappet IV'.

l5. The combination of the cylinder C, the piston V having the head XV provided with the tappet W projecting through the slot IV in the side of the cylinder, the spring X surrounding the piston, the valve mechanism controlling the inlet and exhaust of the motive fluid at the upper side of the piston, the lever S T cooperating with the valve mechanism and provided With the adjustable shoe V' cooperating with the tappet W of the piston, the lever O3, the link F3 connecting the same With the adjustable shoe V', the footlever E3, and the link D3 connecting the same With the lever C3.

16. The combination of the cylinder C, the piston V having the head XV provided With the tappet W projecting through the slot in the side of the cylinder, the spring X surrounding the piston, the valve mechanism controlling the inlet and exhaust of the motive iluid at the upper side of the piston, the lever S T cooperating with the valve mechanism and provided with the adjustable shoe cooperating with the tappet V of the piston, a foot-lever and connections between the same and the adjustable shoe V for adjusting the latter in relation to the tappet ICO V, a valve controlling the inlet of the motive fiuid tothe engine, and connections between the foot-lever and said valve for opening the latter by the act of depressing the foot-lever to adjust the shoe V.

17. The combination of the cylinder C, the piston V having the head XV provided with the tappet XV projecting through the slot lV in the side of the cylinder, the spring X. surrounding the piston, the valve mechanism controlling the inlet and exhaust of thc motive fluid at the upper side of the piston, the lever S T' cooperating with the valve mechanism and provided with the adjustable shoe cooperating with the tappet lV of the piston, the lever Cg and link F3 connecting the same with the adjustable shoe V, the footlever E3 and the link D3 connecting the same with the lever C3, 'the valve ll in the supplypipe M, and the lever A3 cooperating at one end with the stem of said valve and at its opposite end with the lever C3.

i8. The combination of the cylinder C containing the piston V W and resetting-spring X, the valve-casin g secured within the upper end of the cylinder and having the central vertical chamber and the annular chamber E, and the ports F between the chamber E and piston-chamber, the tubular valve A fitting in the central chamber of the valvecasing and having the flange D within the annular chamber E', the central stem J extending longitudinally through the valve A and provided at its lower end with the disk K cooperating with the lower end of the lever A, and means for depressing the valvestein J and valve A in succession as the piston moves downward.

19. The combination of the cylinder C containing the piston V W and resetting-spring X, the valve-casing secured within the upper end of the cylinder and having the central vertical chamber and the annular chamber E', and the ports F between the chamber E and piston-chamber, the tubular valve A fitting in the central chamber of the valve-casing and having the flange D within the annular chamberE',the central stem J' extending longitudinally through the valve A and provided at its lower end with the disk K coperating with the lower end of the valve A', and the lever S T cooperating at one end with the valve-stem J and valve A and provided at its opposite end with a projection cooperating with the tappet W of the piston, to cause the valve-stem J and valve A to be depressed in succession at the downward movement of the piston.

20. The combination of the cylinder C containing the piston V XV and spring X, the valve-Casin g secured in the upper end of said cylinder and consisting of the block Z and lower plate Z having the central vertical chamber, the block Z having also the annular chamber E and the plate Z' having the ports F, the tubular valve A fitting within said central chamber and provided at its upper end with the head G containing the ports Il' and having near its lower end thc i'lange D within the annular chamber E', the central stem J extending through the valve A' and its head G and carrying at its lower end the disk K'coperating with the lower end of the valve A, the inlet-port O communicating with the chamber E, means for successively depressing the valves K and A at the downward stroke of the piston, and the adjustable projection Q upon the piston for lifting the valves K and A.

2l. The combination of an upright supporting-frame, a lower die mounted upon the bed-plate thereof, a vertical cylinder supported on said frame above said die, a piston within said cylinder carrying at its lower end an upper die adapted to cooperate with the lower die, a spring for lifting the piston, valve mechanism controlling theinlet and exhaust of the motive fluid above the piston, adjustable valve-operating means for operating the valve mechanism to cut off the supply and open the exhaust at the upper side of the piston at different points in the downward stroke of the piston, and means Within the control of the operator for adjusting such valve-operating mechanism at will without stopping the engine, to regulate the lengths of the strokes of the piston as desired. j

22. The combination of an upright supporting-frame, a lower die mounted upon the bedplate thereof, a vertical cylinder supported on said frame above said die, a piston within said cylinder carrying at its lower end an upper die adapted to coperate with the lower die, a spring for lifting the piston, valve mechanism controlling the inlet and exhaust of the motive fluid above the piston, and adj ustable valve-operating means controlled by a foot-lever for causing the valve mechanism to open the exhaust and close the inlet at the upper end of the cylinder at different points in the downward movement of the piston, to thereby regulate the lengths of the strokes of the piston as desired.

23. The combination of an upright supporting-frame, a lower die mounted upon the bedplate thereof, a vertical cylinder mounted upon said frame above such lower die, a piston within said cylinder carrying at its lower end an upper die adapted to cooperate with the lower die, a spring for lifting the piston, valve mechanism for admitting and exhausting the motive iiuid above the piston, valveoperating means embodying an adjustable member cooperating with a tappet carried by the piston, the adjustment of said member in relation to the tappet determining the point in the downward stroke of the piston at which the inlet of motive fluid at its upper end shall be cut off and the exhaust opened, and means within the control of the operator for adjusting said adjustable member at will without stopping the engine, to thereby regulate the lengths of the strokes of the piston as desired.

IOO

IIO

2l. The Combination ol an upright supporting-frame, a lower die mounted upon the bedplate thereof, a Vertical cylinder mounted upon said frame above such lower die7 a piston within said cylinder carrying at its lower end an upper die adapted to cooperate with the lower die, a spring for lifting the piston, Valve mechanism for admitting and exhausting the motive fluid above the piston, Valveoperating means embodying an adjustable member cooperating with a tappet carried by the piston, the adj ustment of said member in relation to the tappet determining the point in the downward stroke of the piston at which the inlet of motive fluid at its upper end shall be eut off and the exhaust opened, and a footlever and connections between the saine and sueh adjustable member for adjusting the latter and thereby regulating the lengths of the strokes of the piston by means of the footlever.

25. The combination of an upright supportin g-frame, a lower die mounted upon the bedplate thereof, a vertical cylinder mounted upon said frame above sueh lower die, a piston within said cylinder carrying at its lower end an upper die adapted to coperate with the lower die, a spring for lifting the piston, valve mechanism for admitting and exhausting the motive fluid above the piston, adjustable valve-operating means controlled by a foot-lever for causing the valve mechanism to open the exhaust and close the inlet at the upper end of the cylinder at different points in the downward movement of the piston, to thereby regulate the lengths of the strokes of the piston as desired, a Valve in the supplypassage to the engine, controlling the inlet of the motive uid, and a connection between said valve and the foot-lever, for opening said valve by the aet of depressing the footlever to adjust the Valve-operating means. HENRY VHOMES. Vitnesses:

W. B. ANDERSON, lYUNNIE PARRHYsUIs. 

